I Love You Very Much 2010 one on netflix

When the mother they have never known dies, three half brothers aged 8, 15 and 17 respectively, who were all brought up in different ways, meet for the very first time. They spend the long summer holidays with Nonna, their grandmother, and start sharing secrets and rabbits, polenta and mean tricks, adventures and first time experiences, together. At last their once solitary lives take a new direction.